At least 12 Palestinians, including six members of one family, have been killed in three separate Israeli strikes in the Gaza Strip, according to local medics. The Israeli military said its target was a Hamas operative and that it was still looking into the results of the attack. The Israeli military has not yet commented on those strikes. Four Israeli soldiers have been killed in Palestinian attacks in Gaza over the same period. The UN's human rights office condemned on Tuesday the recent intensification of Israeli military attacks in Gaza.